Warning Z1 Condensate sensor heating mode TR3 open circuit — Condensate sensor TR3 circuit broken

What does 5414 mean?

This warning indicates that the circuit for sensor TR3 is broken, meaning its resistance is greater than 179 kOhm. This usually points to a loose connection, a broken sensor, or a defective I/O module.

• Screw terminal on I/O-module for sensor TR3 not tightened properly.
• sensor TR3 or its signal cable is broken.
• Defective I/O module.

Click steps to track your progress.

1. 1

   Check the screw terminal for sensor TR3 on the I/O module and ensure it is tightened properly.

2. 2

   If the warning persists, contact a qualified technician to measure the sensor's resistance and inspect the signal cable.

3. 3

   Do not attempt to replace sensors or I/O modules unless you are a qualified installer.